If you own a sewing machine that also does embroidery do try some of the wonderful "In-the-Hoop" projects. This is one of the designs from Embroidery Garden. Our daughter requested a padded case for her portable hard drive---this measures 4-3/4 x 6-3/4 when completed.
Everything is done in the hoop! ---including the zipper. This took approx. an hour to make. I added the snap ring.